Solar power plant

ABSTRACT

The solar power plant contains the radiation concentrator fitted with a drive, the system of Sun tracking with a control unit, and a fixedly attached radiation detector, and the drive is made with a possibility of ensuring a straight-line reciprocating movement of the concentrator, and the concentrator is mirror-based with a cylindrical surface having a guide whose current radius value features a deviation from the average value corresponding to the circumradius of the circular cylinder guide by no more than ±10%, and the radiation detector—photoelectric converter, is located in the focal plane.

FIELD OF ENGINEERING

[0001] The invention is related to solar-energy engineering and may beused in devices concentrating solar radiation.

PREVIOUS ENGINEERING LEVEL

[0002] There are known solar power plants that contain a mirror-basedconcentrator of solar energy in which focus there is a radiationdetector made in the form of a heat exchanger (SU 1190154 A 1, F24J1/100, 1985), photoelectric or thermo-emission converter (SU 1274032 F1, H01L 31/00, 1987; SU 1825071 A 1, F24J 2/00, 1996)

[0003] The main drawback of this approach, even with a concentrator maderotatable for orienting it towards the Sun, is low efficiency of usingsolar energy.

[0004] A version which is the closest to the invention is a solar powerplant containing several concentrators fitted with drives, a system ofSun tracking and a unit of drives control ensuring a possibility ofautomatic orientation, and a fixedly attached radiation detector (SU1141275 A 1, F24J 2/00, 1985).

[0005] However the system of Sun tracking is rather complicated andexpensive, making economically unreasonable the use of such installationin the national economy.

DISCLOSURE OF THE INVENTION

[0006] The invention is aimed at creating a solar power plant withstructurally simple concentrator drive and Sun tracking system thatwould provide for efficient use of solar energy.

[0007] The solution of the set task is achieved in such a way, that thesolar power plant containing the radiation concentrator fitted with adrive, the system of Sun tracking with a control unit, and a fixedlyattached radiation detector, according to the invention, the drive ismade with a possibility of ensuring a straight-line reciprocatingmovement of the concentrator, and the concentrator is mirror-based witha cylindrical surface having a guide whose current radius value featuresa deviation from the average value corresponding to the circumradius ofthe circular cylinder guide by no more than ±10%, and the radiationdetector—photoelectric converter, is located in the focal plane.

[0008] It is preferable that the solar power plant would be made withseveral radiation concentrators with a fixedly located photoelectricconverter placed in the focal plane of each of them, and theconcentrators have a common drive ensuring their plane-parallel motion.

[0009] Plane-parallel, straight-line motion of the concentratordetermines the simplicity of the Sun tracking system drive andreliability of control of the solar power plant for the uniform andefficient guidance of solar beams reflected by the cylindrical surfaceof the concentrators to the stationary radiation detectors-photoelectricconverters, and this, with a selected ratio of geometric parameters,raises the efficiency of direct conversion of solar energy into electricenergy.

BRIEF DESCRIPTION OF DRAWINGS

[0010] Shown in FIG. 1 is the schematic general view of the solar powerplant.

[0011]FIG. 2 shows schematic view of concentrator 1.

THE BEST INVENTION EMBODIMENT

[0012] The solar power plant contains mirror-based cylindrical radiationconcentrators 1 fitted with common drive 2 ensuring the possibility ofstraight-line reciprocating (plane-parallel) movement of concentrators1, the Sun tracking system with the control unit (not shown in thedrawing), drive 2 and fixedly attached radiation detectors made in theform of photoelectric converters 3 installed in the focal plane.

[0013] In this case the solar power plant is characterized by thefollowing ratio of geometrical characteristics:

1,1 R _(k) ≧R _(i)≧0.9R _(k);

L=0.5 R _(k),

[0014] where:

[0015] R—average value of the guide radius corresponding to thecircumradius—circular cylinder guide;

[0016] R_(i)—current value of the guide radius of concentratorcylindrical surface;

[0017] L—distance from the plane of the photoelectric converter to theconcentrator cylindrical surface.

[0018] The solar power plant operates in the following way.

[0019] Solar beams reflected by mirror-based concentrators 1 fall onphotoelectric converters 3 in which direct conversion of light energyinto electric energy occurs. In the course of orientation to the Sun thetracking system, as it operates drive 2, realizes such unidimensional(straight-line, plane-parallel) movement of mirror-based concentrators 1(shown by a dotted line in the drawing) under which the reflected solarbeams due to a selected combination of the shapes of concentrators 1 andlocation of radiation detectors are constantly directed and uniformlydistributed over the working surface of photoelectric converters 3which, with a structural simplicity of drive 2 and tracking system, doesensure the efficiency of the use of the solar power plant for directconversion of solar energy to electric one even with concentrators 1surfaces made with a preset deviation from the circular cylinder.

1. A solar power plant containing the radiation concentrator fitted witha drive, the system of Sun tracking with a control unit, and a fixedlyattached radiation detector, which is characterized by that the drive ismade with a possibility of ensuring a straight-line reciprocatingmovement of the concentrator, and the concentrator is mirror-based witha cylindrical surface having a guide whose current radius value featuresa deviation from the average value corresponding to the circumradius ofthe circular cylinder guide by no more than ±10%, and the radiationdetector-photoelectric converter, is located in the focal plane.
 2. Asolar power plant according to claim 1 characterized by that it is madewith several radiation concentrators with a fixedly locatedphotoelectric converter placed in the focal plane of each of them, andthe concentrators have a common drive ensuring their plane-parallelmovement.